On the Processing of Dual-Channel Receiving Signals of the LuTan-1 SAR System
LuTan-1 (LT-1) is an innovative spaceborne radar Earth observation mission including two satellites equipped with synthetic aperture radar (SAR) which will be launched in 2022. Active phased array antennas that can be divided into two physical channels are equipped on each satellite. The signal can...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-01-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/14/3/515 |
| _version_ | 1797485093915197440 |
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| author | Haoyu Lin Yunkai Deng Heng Zhang Dacheng Liu Da Liang Tingzhu Fang Robert Wang |
| author_facet | Haoyu Lin Yunkai Deng Heng Zhang Dacheng Liu Da Liang Tingzhu Fang Robert Wang |
| author_sort | Haoyu Lin |
| collection | DOAJ |
| description | LuTan-1 (LT-1) is an innovative spaceborne radar Earth observation mission including two satellites equipped with synthetic aperture radar (SAR) which will be launched in 2022. Active phased array antennas that can be divided into two physical channels are equipped on each satellite. The signal can be transmitted through the full antenna without broadening and recorded by each channel. Therefore, two methods can be used to preprocess the dual-channel receiving signals, referred to as dual-channel echo reconstruction and dual-channel echo synthesis. The former is inherited from the traditional high-resolution wide-swath mode and the latter is a method that takes coherent superposition as the reference. This paper researches the impacts of the two methods in system performance and imaging quality. Principles and theoretical models are firstly given. Furthermore, the system performance under the “L1A_SM_S” working mode of the LT-1 is simulated to compare the differences between the two methods, which mainly focuses on azimuth ambiguity-to-signal ratio, noise equivalent sigma zero, and the performance of block adaptive quantization. Afterwards, the test data acquired by the ground validation system of the LT-1 are used for the hardware-in-the-loop simulation to demonstrate the imaging quality between the two methods. Finally, a quantitative comparison is given. |
| first_indexed | 2024-03-09T23:14:52Z |
| format | Article |
| id | doaj.art-97cb9a1285bc4eaf8acd4c83709b09cd |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T23:14:52Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-97cb9a1285bc4eaf8acd4c83709b09cd2023-11-23T17:38:56ZengMDPI AGRemote Sensing2072-42922022-01-0114351510.3390/rs14030515On the Processing of Dual-Channel Receiving Signals of the LuTan-1 SAR SystemHaoyu Lin0Yunkai Deng1Heng Zhang2Dacheng Liu3Da Liang4Tingzhu Fang5Robert Wang6Space Microwave Remote Sensing System Department, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaSpace Microwave Remote Sensing System Department, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaSpace Microwave Remote Sensing System Department, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaSpace Microwave Remote Sensing System Department, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaFaculty of Information Science and Engineering, College of Marine Technology, Ocean University of China, Qingdao 266100, ChinaSpace Microwave Remote Sensing System Department, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaSpace Microwave Remote Sensing System Department, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaLuTan-1 (LT-1) is an innovative spaceborne radar Earth observation mission including two satellites equipped with synthetic aperture radar (SAR) which will be launched in 2022. Active phased array antennas that can be divided into two physical channels are equipped on each satellite. The signal can be transmitted through the full antenna without broadening and recorded by each channel. Therefore, two methods can be used to preprocess the dual-channel receiving signals, referred to as dual-channel echo reconstruction and dual-channel echo synthesis. The former is inherited from the traditional high-resolution wide-swath mode and the latter is a method that takes coherent superposition as the reference. This paper researches the impacts of the two methods in system performance and imaging quality. Principles and theoretical models are firstly given. Furthermore, the system performance under the “L1A_SM_S” working mode of the LT-1 is simulated to compare the differences between the two methods, which mainly focuses on azimuth ambiguity-to-signal ratio, noise equivalent sigma zero, and the performance of block adaptive quantization. Afterwards, the test data acquired by the ground validation system of the LT-1 are used for the hardware-in-the-loop simulation to demonstrate the imaging quality between the two methods. Finally, a quantitative comparison is given.https://www.mdpi.com/2072-4292/14/3/515synthetic aperture radar (SAR)azimuth dual-channel SARsignal reconstructionsignal synthetic |
| spellingShingle | Haoyu Lin Yunkai Deng Heng Zhang Dacheng Liu Da Liang Tingzhu Fang Robert Wang On the Processing of Dual-Channel Receiving Signals of the LuTan-1 SAR System Remote Sensing synthetic aperture radar (SAR) azimuth dual-channel SAR signal reconstruction signal synthetic |
| title | On the Processing of Dual-Channel Receiving Signals of the LuTan-1 SAR System |
| title_full | On the Processing of Dual-Channel Receiving Signals of the LuTan-1 SAR System |
| title_fullStr | On the Processing of Dual-Channel Receiving Signals of the LuTan-1 SAR System |
| title_full_unstemmed | On the Processing of Dual-Channel Receiving Signals of the LuTan-1 SAR System |
| title_short | On the Processing of Dual-Channel Receiving Signals of the LuTan-1 SAR System |
| title_sort | on the processing of dual channel receiving signals of the lutan 1 sar system |
| topic | synthetic aperture radar (SAR) azimuth dual-channel SAR signal reconstruction signal synthetic |
| url | https://www.mdpi.com/2072-4292/14/3/515 |
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